DE112018003802B4 - Air conditioning unit for a vehicle - Google Patents

Abstract

An air conditioning unit for a vehicle, comprising: an air conditioning case (12) defining therein a first upstream ventilation path (121) through which air flows, a second upstream ventilation path (122) through which air flows and which is in parallel with the first upstream ventilation path , a first downstream ventilation path (123) through which the air flowing out of the first upstream ventilation path flows, and a second downstream ventilation path (124) which is parallel to the first downstream ventilation path and through which the air flowing out from the second upstream ventilation path flows;a blower (20) having a blower fan (201) rotating about a fan axis (CL1) in the air-conditioning case, the blower blowing air discharged from the first upstream-side ventilation path and the second upstream-side ventilation path from one side in an ax ial direction (DRa) of the fan axis by rotation of the blower fan, the blower causing the drawn air to flow to the first downstream-side ventilation path and the second downstream-side ventilation path; andan upstream-side guide member (26) disposed on one side of the blower fan in the axial direction in the air-conditioning case, and the air flowing out of the first upstream-side ventilation path and the air flowing out of the second upstream-side ventilation path from one side to the other side, which faces to the one side in the axial direction, leads to the blower fan, the upstream-side guide member having a twisted shape in which the other side of the upstream-side guide member in the axial direction relative to the one side thereof around the fan axis in a direction opposite to is twisted in a direction of rotation (RTf) of the blower fan, and the upstream-side guide member guides the air to the blower fan along the twisted shape.

Description

technical field

The present disclosure relates to an air conditioning unit for a vehicle.

State of the art

As this type of vehicle air-conditioning unit, for example, a vehicle air-conditioning unit disclosed in the reference JP 2016 - 011 101 A is described. The vehicle air conditioner unit described therein has a blower fan that sucks and blows out air from a plurality of air passages in a case, and a suction-side partition member that is arranged on a suction side of the blower fan in the case. In addition, the air conditioning unit for vehicles of JP 2016 - 011 101 A a discharge-side partition member arranged on a discharge side of the blower fan in the case. Each of the suction-side dividing member and the discharge-side dividing member divides airflows from the plurality of air passages from each other, and mixing of a plurality of the airflows is suppressed by dividing the airflows as described above.

In addition, the suction-side partition member and the discharge-side partition member are arranged such that a relative position of the discharge-side partition member with respect to the suction-side partition member is shifted in a rotation direction of the blower fan. In addition, the relative position of the discharge-side partition member with respect to the suction-side partition member is adjusted by rotating the suction-side partition member by an electric actuator.

The pamphlet DE 10 2008 000 168 A1 discloses a generic fan assembly that includes a pre-swirler that causes the direction of air entering the fan assembly to be changed. The fan assembly includes a fan housing including a fluid inlet and a fluid outlet spaced therefrom; a fan arranged in the fan housing; and a pre-swirler disposed in the inlet of the fan housing. The pre-swirl generator is designed in one piece with the fan housing.

Summary of the Invention

The air conditioning unit for vehicles of the JP 2016 - 011 101 A is configured to allow air flowing out of a plurality of ventilation paths on the upstream side in the case, namely an air conditioner housing, to flow out of a plurality of ventilation paths on the downstream side by the blower fan. In such a vehicle air-conditioning unit, each air flow discharged from the plurality of ventilation paths on the upstream side is rotated about a fan axis by rotation of the blower fan and then flows into the plurality of ventilation paths on the downstream side. Namely, each airflow discharged from the plurality of upstream-side ventilation paths generates a phase shift around the fan axis in an alternate arrangement of the airflows due to the rotation of the blower fan and flows into the plurality of downstream-side ventilation paths.

On the other hand, a case is assumed where it is desired to suppress the phase shift of each air flow due to the rotation of the blower fan. For example, in an air conditioning unit having a two-layer structure of inside and outside air (inside air and outside air, respectively), in order to achieve both ventilation loss reduction and window fogging prevention, a window washer is arranged on an upper side of a vehicle windshield was performed using the outside air, and heating of the occupant's feet by the inside air was performed. On the other hand, in order to introduce the outside air into an interior of the vehicle, the outside air needs to be introduced from above the air conditioning unit into the air conditioning case through an outside air introduction duct. Therefore, a ventilation path through which the outside air flows is provided on both an airflow upstream side and an airflow downstream side with respect to the blower fan in the air conditioning case above a ventilation path through which the inside air flows.

As such, in various air conditioning units taking the air conditioning unit having the two-layer structure of indoor and outdoor air as an example, a case is assumed where it is preferable to increase the phase shift of each air flow due to the rotation of the blower fan suppress. Therefore, the inventors considered the phase shift using the suction-side splitting element of FIG JP 2016 - 011 101 A to suppress.

However, since the suction-side splitting element adjusts the phase shift by being rotated, a stage in a ver bonding portion between a partition wall that partitions an air passage on an upstream side in air flow with respect to the suction-side partition member and the suction-side partition member depending on a rotational position of the suction-side partition member. Here, since the step locally deforms a route of air flow along the suction-side partition member, there was a possibility that the step would cause the air flow along the suction-side partition member to be disturbed. As a result of extensive studies by the inventors, the problem was found as described above.

The present disclosure has been made in consideration of the above-described problems, and an object of the present disclosure is to suppress phase shift about a fan axis occurring in alternate arrangement of a plurality of airflows due to rotation of a blower fan between a plurality of upstream ventilation paths and a plurality of downstream ventilation paths is formed while smoothly guiding an air flow to an upstream side or a downstream side in the air flow with respect to the blower fan.

• ein Klimaanlagengehäuse, das darin einen ersten stromaufwärtsseitig liegenden Belüftungspfad definiert, durch den eine Luft strömt, einen zweiten stromaufwärtsseitig liegenden Belüftungspfad, durch den eine Luft strömt, und der parallel mit dem ersten stromaufwärtsseitig liegenden Belüftungspfad ist, einen ersten stromabwärtsseitig liegenden Belüftungspfad, durch den die aus dem ersten stromaufwärtsseitig liegenden Belüftungspfad ausströmende Luft strömt, und einen zweiten stromabwärtsseitig liegenden Belüftungspfad, der parallel zu dem ersten stromabwärtsseitig liegenden Belüftungspfad liegt, und durch den die aus dem zweiten stromaufwärtsseitig liegenden Belüftungspfad ausströmende Luft strömt;
• ein Gebläse, das einen Gebläseventilator hat, das um eine Ventilatorachse in dem Klimaanlagengehäuse dreht, wobei das Gebläse eine aus dem ersten stromaufwärtsseitig liegenden Belüftungspfad ausströmende und dem zweiten stromaufwärtsseitig liegenden Belüftungspfad von einer Seite in einer axialen Richtung der Ventilatorachse durch eine Drehung des Gebläseventilators ausströmende Luft anzieht, und das Gebläse verursacht, dass die angezogene Luft zu dem ersten stromabwärtsseitig liegenden Belüftungspfad und dem zweiten stromabwärtsseitig liegenden Belüftungspfad strömt; und
• ein stromaufwärtsseitig liegendes Führungselement, das an der einen Seite des Gebläseventilators in der axialen Richtung in dem Klimaanlagengehäuse angeordnet ist und zu dem Gebläseventilator die aus dem ersten stromaufwärtsseitig liegenden Belüftungspfad und dem zweiten stromaufwärtsseitig liegenden Belüftungspfad ausströmende Luft von der einen Seite zu der anderen Seite führt, die der einen Seite in der axialen Richtung gegenüberliegt, wobei
• das stromaufwärtsseitig liegende Führungselement eine verdrehte Form aufweist, in der die andere Seite des stromaufwärtsseitig liegenden Führungselements in der axialen Richtung relativ zu der einen Seite davon um die Ventilatorachse in einer Richtung entgegengesetzt zu einer Drehrichtung des Gebläseventilators verdreht ist, und
• das stromaufwärtsseitig liegende Führungselement die Luft entlang der verdrehten Form zu dem Gebläseventilator führt.

In order to achieve the object, an air conditioning unit for a vehicle according to an aspect of the present disclosure:

• an air conditioning case defining therein a first upstream ventilation path through which air flows, a second upstream ventilation path through which air flows and which is in parallel with the first upstream ventilation path, a first downstream ventilation path through which the air discharged from the first upstream ventilation path flows, and a second downstream ventilation path which is parallel to the first downstream ventilation path and through which the air discharged from the second upstream ventilation path flows;
• a blower having a blower fan rotating around a fan axis in the air conditioner case, the blower blowing air flowing out of the first upstream ventilation path and the second upstream ventilation path from a side in an axial direction of the fan axis by rotation of the blower fan attracts, and the blower causes the attracted air to flow to the first downstream ventilation path and the second downstream ventilation path; and
• an upstream-side guide member that is disposed on one side of the blower fan in the axial direction in the air-conditioning case and guides the air discharged from the first upstream-side ventilation path and the second upstream-side ventilation path to the blower fan from one side to the other side, which is opposite to the one side in the axial direction, where
• the upstream guide member has a twisted shape in which the other side of the upstream guide member in the axial direction is twisted relative to the one side thereof about the fan axis in a direction opposite to a rotating direction of the blower fan, and
• the upstream guide member guides the air along the twisted shape to the blower fan.

According to such a configuration, the air currents flowing out of the first and second upstream-side ventilation paths are turned in the opposite direction to the rotating direction of the blower fan in advance, and then flow into the blower fan. This acts in a direction in which a phase shift around the fan axis generated due to the rotation of the blower fan in alternate arrangement of the plurality of air flows is canceled, and it is thus possible to suppress the phase shift.

Since the upstream-side guide member guides the air to the blower fan along the twisted shape, it is possible to avoid the generation of the step caused by the suction-side partition member of FIG JP 2016 - 011 101 A is caused. For this reason, it is possible to smoothly guide the air flow on the upstream side in the air flow with respect to the blower fan.

• ein Klimaanlagengehäuse, das einen ersten stromaufwärtsseitig liegenden Belüftungspfad definiert, durch den Luft strömt, einen zweiten stromaufwärtsseitig liegenden Belüftungspfad, durch den Luft strömt, und der parallel zu dem ersten stromaufwärtsseitig liegenden Belüftungspfad liegt, einen ersten stromabwärtsseitig liegenden Belüftungspfad, durch den die aus dem ersten stromaufwärtsseitig liegenden Belüftungspfad ausströmende Luft strömt, und einen zweiten stromabwärtsseitig liegenden Belüftungspfad, der parallel zu dem ersten stromabwärtsseitig liegenden Belüftungspfad liegt, und durch den die aus dem zweiten stromaufwärtsseitig liegenden Belüftungspfad ausströmende Luft strömt;
• ein Gebläse, das einen Gebläseventilator hat, der um eine Ventilatorachse in dem Klimaanlagengehäuse dreht, wobei das Gebläse aus dem ersten stromaufwärtsseitig liegenden Belüftungspfad und dem zweiten stromaufwärtsseitig liegenden Belüftungspfad von einer Seite die Ventilatorachse in einer axialen Richtung durch eine Drehung des Gebläseventilators ausströmende Luft anzieht, und das Gebläse verursacht, dass die angezogene Luft zu dem ersten stromabwärtsseitig liegenden Belüftungspfad und dem zweiten stromabwärtsseitig liegenden Belüftungspfad strömt; und
• eine Mehrzahl von stromabwärtsseitig liegenden Führungselementen, die in dem Klimaanlagengehäuse vorgesehen sind und die aus dem Gebläseventilator ausströmende Luft zu dem ersten stromabwärtsseitig liegenden Belüftungspfad und dem zweiten stromabwärtsseitig liegenden Belüftungspfad führen, wobei
• die Mehrzahl der stromabwärtsseitig liegenden Führungselemente konfiguriert sind, ein Drehbestandteil, das durch die Drehung des Gebläseventilators vermittelt ist, einer Strömungsgeschwindigkeit der aus dem Gebläseventilator ausströmenden Luft durch Führen der aus dem Gebläseventilator ausströmenden Luft entlang der Mehrzahl der stromabwärtsseitig liegenden Führungselemente zu verringern.

An air conditioning unit for a vehicle according to another aspect has:

• an air conditioning case defining a first upstream ventilation path through which air flows, a second upstream ventilation path through which air flows and which is parallel to the first upstream ventilation path, a first downstream ventilation path through which the air flowing out of the first upstream ventilation path flows, and a second downstream ventilation path which is parallel to the first downstream ventilation path, and through which the air discharged from the second upstream ventilation path flows;
• a blower having a blower fan rotating around a fan axis in the air conditioner case, the blower drawing air flowing out of the first upstream ventilation path and the second upstream ventilation path from a side of the fan axis in an axial direction by rotation of the blower fan, and the blower causes the drawn air to flow to the first downstream ventilation path and the second downstream ventilation path; and
• a plurality of downstream guide members that are provided in the air conditioner case and guide the air outflow from the blower fan to the first downstream ventilation path and the second downstream ventilation path, wherein
• the plurality of downstream-side guide members are configured, a rotation component imparted by rotation of the blower fan, to reduce a flow speed of air discharged from the blower fan by guiding the air discharged from the blower fan along the plurality of downstream-side guide members.

According to such a configuration, compared to a case where the downstream guide members are not provided, it becomes difficult for the air flowing out of the blower fan to advance in the rotating direction of the blower fan before flowing into each of the first and second downstream ventilation paths . For this reason, it is possible to suppress the phase shift about the fan axis generated in the alternate arrangement of the plurality of air flows as described above.

Similar to the air conditioning unit for a vehicle according to an aspect described above, it is possible to avoid generation of the step caused by the suction-side partition member of FIG JP 2016 - 011 101 A is caused. For this reason, it is possible to smoothly guide the air flow on the downstream side in the air flow with respect to the blower fan.

It is noted that reference characters and the like attached to the corresponding components indicate an example of correspondence of a relationship between the components and the like and the specific components described in the embodiments that will be described later.

character list

• the 1 12 is a schematic cross-sectional view showing a schematic configuration of an air conditioning unit for vehicles in a first embodiment.
• the 2 14 is a perspective view extracting and showing a downstream-side guide member and edge portions thereof in a first embodiment.
• the 3 14 is a perspective view extracting and showing a downstream-side guide member and edge portions thereof in the first embodiment.
• the 4 FIG. 14 is a cross-sectional view showing a cross-sectional view taken along line IV-IV of FIG 1 in the first embodiment shows.
• the 5 FIG. 12 is a cross-sectional view showing a cross-sectional view taken along line VV of FIG 1 in the first embodiment shows.
• the 6 13 is a cross-sectional view showing a cross section along line VI-VI which is closer to the other side in an axial direction of the fan as compared with the cross section along line VV of FIG 1 is positioned in the first embodiment.
• the 7 FIG. 14 is a cross-sectional view showing a cross section along line VII-VII closer to the other side in the axial direction of the fan as compared with the cross section along line VI-VI of FIG 1 is positioned in the first embodiment.
• the 8th 13 is a cross-sectional view showing a cross-sectional view taken along line VIII-VIII of FIG 5 in the first embodiment shows.
• the 9 FIG. 14 is a cross-sectional view showing a cross-sectional view taken along line IX-IX of FIG 1 in the first embodiment shows.
• the 10 FIG. 14 is a cross-sectional view showing a cross section taken along line XX of FIG 9 in the first embodiment shows.
• the 11 14 is a perspective view extracting and showing an upstream-side guide member and edge portions thereof in a second embodiment, and is a view corresponding to FIG 2 .
• the 12 13 is a schematic cross-sectional view showing a schematic configuration of an air conditioning unit for vehicles in a third embodiment, and is a view showing a position of a cross section along a line XIV-XIV and a position of a cross section along a line XV-XV in the same cross-sectional view as the 1 indicates.
• the 13 14 is a perspective view extracting and showing a downstream-side guide member and edge portions thereof in the third embodiment, and is a view corresponding to FIG 3 .
• the 14 FIG. 14 is a cross-sectional view showing a cross section taken along line XIV-XIV of FIG 12 in the third embodiment shows and is a view corresponding to FIG 9 .
• the 15 13 is a cross-sectional view showing a cross section along line XV-XV which is closer to the other side in an axial direction of the fan than compared with the cross section along line XIV-XIV of FIG 12 is positioned in the third embodiment.
• the 16 14 is a perspective view extracting and showing a downstream-side guide member and edge portions thereof in a fourth embodiment, and is a view corresponding to FIG 3 .
• the 17 FIG. 14 is a cross-sectional view showing a cross section taken along a line IX-IX of FIG 1 in the fourth embodiment, and is a view corresponding to FIG 9 .
• the 18 14 is a perspective view extracting and showing a downstream-side guide member and edge portions thereof in a fifth embodiment, and is a view corresponding to FIG 3 .
• the 19 FIG. 14 is a cross-sectional view showing a cross section taken along a line IX-IX of FIG 1 in the fifth embodiment, and is a view corresponding to FIG 9 .
• the 20 12 is a schematic cross-sectional view showing a schematic configuration of a vehicle air conditioning unit in another embodiment, and is a view corresponding to FIG 1 .

Description of Embodiments

In the following, each embodiment will be described with reference to the drawings. Note that in each of the following embodiments, portions that are the same as or equivalent to others are denoted by the same reference numerals in the drawings.

(First embodiment)

How from the 1 As can be seen, an air conditioning unit 10 for vehicles according to the present embodiment has an air conditioner case 12, a filter 13, an evaporator 16, a heater core 18, a blower 20, a plurality of doors 21, 22, 23, 24a, 24b and 25, an upstream side and a plurality of downstream-side guide members 28. The vehicle air-conditioning unit 10 is arranged, for example, inside an instrument panel provided at the foremost portion in the interior of a vehicle. It should be noted that the representation of the corresponding guide elements 26 and 28 in FIG 1 Indicate positions of the respective guide members 26 and 28 in a front-rear direction DR1 of the vehicle, and the 1 FIG. 12 is not a view showing specific shapes of the guide members 26 and 28. FIG.

In addition, corresponding arrows denote DR1, DR2 and DR3 in FIGS 1 and 4 Directions of a vehicle in which the vehicle air conditioning unit 10 is mounted. An arrow DR1 in the 1 Namely, denotes a front-rear direction DR1 of the vehicle, an arrow DR2 in FIG 1 denotes a vehicle top-down direction DR2, and an arrow DR3 in FIG 4 denotes a left-right direction DR3 of the vehicle, namely, a widthwise direction DR3 of the vehicle. These directions DR1, DR2, and DR3 are intersecting directions, strictly speaking, directions perpendicular to each other.

The air conditioning case 12 is a member that forms an outer shell of the vehicle air conditioning unit 10 and is formed of resin. The air conditioner case 12 has a shape of a pipe extending in the vehicle front-rear direction DR<b>1 as a whole. For example, the air conditioner case 12 basically has a tubular shape with a rectangular cross section as shown in FIG 2 can be seen, but has a cylindrical shape in a portion of the fan 20, the one Blower fan 201 absorbs, as shown in FIG 3 is evident.

How from the 1 As can be seen, a plurality of upstream-side ventilation paths 121 and 122 through which air flows and a plurality of downstream-side ventilation paths 123 and 124 through which air flows are formed inside the air-conditioning case 12 . For example, all of these ventilation paths 121, 122, 123, and 124 are formed so as to extend in the vehicle front-rear direction DR1.

Specifically, in the present embodiment, the plurality of upstream ventilation paths 121 and 122 formed in the air conditioner case 12 are a first upstream ventilation path 121 and a second upstream ventilation path 122. The second upstream ventilation path 122 is a ventilation path connected in parallel is provided with the first upstream ventilation path 121 . How from the 1 and 4 As can be seen, the air conditioning case 12 has an upstream partition wall 125 . The upstream partition wall 125 is arranged between the first upstream ventilation path 121 and the second upstream ventilation path 122 , and partitions between the first upstream ventilation path 121 and the second upstream ventilation path 122 . Briefly, the upstream partition wall 125 is a partition wall between the first upstream ventilation path 121 and the second upstream ventilation path 122. Thus, the first upstream ventilation path 121 is provided above the second upstream ventilation path 122.

How additionally from the 1 As can be seen, in the present embodiment, the plurality of downstream ventilation paths 123 and 124 formed in the air conditioner case 12 are specifically a first downstream ventilation path 123 and a second downstream ventilation path 124. The first downstream ventilation path 123 is a ventilation path , through which air exhausted from the first upstream-side ventilation path 121 flows, and the second downstream-side ventilation path 124 is a ventilation path through which air exhausted from the second upstream-side ventilation path 122 flows. The second downstream ventilation path 124 is arranged in parallel with the first downstream ventilation path 123 .

In addition, the air conditioning case 12 has a partition wall 126 on the downstream side. The downstream partition wall 126 is disposed between the first downstream ventilation path 123 and the second downstream ventilation path 124 , and partitions between the first downstream ventilation path 123 and the second downstream ventilation path 124 . In short, the downstream partition wall 126 is a partition wall between the first downstream ventilation path 123 and the second downstream ventilation path 124 . Thus, the first downstream ventilation path 123 is provided above the second downstream ventilation path 124 .

The filter 13 is provided from, for example, a non-woven fabric or the like. The filter 13 is housed in the air conditioner case 12 and is provided so as to extend across both the first upstream ventilation path 121 and the second upstream ventilation path 122 via the upstream partition wall 125 . The filter 13 filters the air flowing through the first upstream ventilation path 121 and filters the air flowing through the second upstream ventilation path 122 .

The evaporator 16 is a cooling heat exchanger that cools the air passing through the evaporator 16 . The evaporator 16 is accommodated in the air conditioner case 12 and is provided so as to extend across both the first downstream ventilation path 123 and the second downstream ventilation path 124 via the downstream partition wall 126 . The evaporator 16 cools the air flowing through the first downstream ventilation path 123 and cools the air flowing through the second downstream ventilation path 124 .

For example, the evaporator 16 constitutes a well-known refrigeration cycle device that circulates refrigerant, together with a compressor, a condenser, and an expansion valve (not shown). The evaporator 16 exchanges heat between the air passing through the evaporator 16 and the refrigerant, and evaporates the refrigerant and cools the air through the heat exchange.

The blower 20 has a blower fan 201 provided in the air conditioner case 12 and around a fan axis CL1 rotates, and a fan motor 202 which drives the blower fan 201 to rotate. The blower fan 201 is a centrifugal fan in the present embodiment.

The blower 20, which is a centrifugal blower, sucks air from one side in the axial direction DRa of the fan axis CL<b>1 by the rotation of the blower fan 201 and blows the sucked air outward in a radial direction of the blower fan 201 . Since the blower fan 201 blows the air outward in the radial direction while rotating, it is to be noted that a flow velocity of the air discharged from the blower fan 201 has not only a velocity component toward the outside in the radial direction but also a rotational component, imparted by the rotation of the blower fan 201. In short, the air discharged from the blower fan 201 flows in a rotating direction RTf of the blower fan 201 while flowing to the outside in the radial direction of the blower fan 201 as long as it is not restricted at all.

Specifically, the blower fan 201 is arranged between the first and second upstream ventilation paths 121 and 122 and the first and second downstream ventilation paths 123 and 124 in the axial direction DRa of the fan axis CL1. In detail, the blower fan 201 is arranged on an air flow downstream side with respect to the first upstream ventilation path 121 and the second upstream ventilation path 122, and on an air flow upstream side with respect to the first downstream ventilation path 123 and the second downstream ventilation path 124. For this reason, the blower 20 sucks the air flowing out of the first upstream ventilation path 121 and the second upstream ventilation path 122 from one side in the axial direction DRa of the fan axis CL1 through the upstream guide member 26 through the Rotation of the blower fan 201. At the same time, the blower 20 allows the sucked air to flow to the first downstream ventilation path 123 and the second downstream ventilation path 123 ad 124 flows through the guide elements 28 located on the downstream side.

Note that the axial direction DRa of the fan axis CL1 in the present embodiment coincides with the vehicle front-rear direction DR1. In addition, the axial direction DRa of the fan axis CL<b>1 is also referred to as an axis direction DRa of the fan. In addition, the radial direction of the blower fan 201 is a radial direction of the fan axis CL1. The radial direction of the fan axis CL1 is also referred to as a fan radial direction.

The blower fan 201 of the blower 20 is disposed on an airflow upstream side with respect to the evaporator 16 disposed in the first downstream ventilation path 123 and the second downstream ventilation path 124 . The blower fan 201 is arranged so that an air suction side of the blower fan 201 faces an opposite side to the first and second downstream-side ventilation paths 123 and 124, namely, a side in the fan axis direction DRa.

The first and second downstream side ventilation paths 123 and 124 are arranged such that the respective air inflow sides of the first and second downstream side ventilation paths 123 and 124 are opened to one side in the fan axis direction DRa. Therefore, the air flows into the first and second downstream side ventilation paths 123 and 124 from one side in the fan axis direction DRa, respectively.

That is, the ventilation fan 201 is arranged in a direction in which the other side of the fan axis CL<b>1 extends to an air flow downstream side of the first and second downstream ventilation paths 123 and 124 . In other words, the blower fan 201 is arranged so that the other side of the blower fan 201 is directed toward air inflow sides of the first and second downstream-side ventilation paths 123 and 124 in the fan axis direction DRa.

The air conditioner case 12 has a fan case wall 127 arranged on one side in the fan axis direction DRa with respect to the blower fan 201 and on the other side in the fan axis direction DRa with respect to the upstream-side guide member 26 . The fan case wall 127 partitions the inside of the air conditioner case 12 into one side and the other side in the fan axis direction DRa. A fan suction hole 127 a penetrating through the fan case wall 127 in the fan axis direction DRa is formed in a central portion of the fan case wall 127 . Therefore, the air sucked into the blower fan 201 by the rotation of the blower fan 201 is directed from one side in the axis direction direction DRa of the fan is sucked into the blower fan 201 through the fan suction hole 127a. Note that the other side in the fan axis direction DRa is an opposite side to the one side in the fan axis direction DRa.

The heater core 18 is a heater that heats air passing through the heater core 18 . The heater core 18 is housed in the air conditioner case 12 and is provided so as to extend across both the first downstream ventilation path 123 and the second downstream ventilation path 124 via the downstream partition wall 126 .

However, the heater core 18 is arranged on a downstream side in the air flow with respect to the evaporator 16 . An upper bypass passage 123 that allows air to flow parallel to the heater core 18 is formed above the heater core 18 in the first downstream ventilation path 123 . In addition, a lower bypass passage 124 a that allows air to flow parallel to the heater core 18 is formed under the heater core 18 in the second downstream side ventilation path 124 . Namely, the bypass passages 123a and 124a are bypass passages that allow the air from the evaporator 16 to bypass the heater core 18 to flow therethrough accordingly.

A first air mixing door 24 a is provided on an air flow upstream side with respect to the heater core 18 and an air flow downstream side with respect to the evaporator 16 in the first downstream side ventilation path 123 . The first air-mixing door 24a is a sliding type door mechanism, and is slid by an electric actuator (not shown). The first air mix door 24a opens and closes an air inflow side of the heater core 18 and opens and closes the upper bypass passage 123a in the first downstream ventilation path 123.

The first air mix door 24a adjusts an air volume ratio between an air volume passing through the heater core 18 and an air volume passing through the upper bypass passage 123a according to a sliding position thereof.

A second air mixing door 24 b is provided on the air flow upstream side with respect to the heater core 18 and the air flow downstream side with respect to the evaporator 16 in the second downstream ventilation path 124 . The second air-mixing door 24b is a sliding type door mechanism, and is slid by an electric actuator (not shown). The second air mix door 24b opens and closes an air inflow side of the heater core 18 and opens and closes the lower bypass passage 124a in the second downstream side ventilation path 124.

The second air mix door 24b adjusts an air volume ratio between an air volume passing through the heater core 18 and an air volume passing through the lower bypass passage 124a according to a sliding position thereof.

In the air conditioner case 12, a face blowout port 12a, a defrost blowout port 12b, and a foot blowout port 12c for blowing out the air to the outside of the air conditioner case 12 are formed. The face blow-off port 12a and the defrost blow-off port 12b are connected to the first downstream side ventilation path 123 on the downstream side in the airflow with respect to the heater core 18 and the bypass upper passage 123a, respectively. In addition, the foot blow-off port 12c is connected to the second downstream ventilation path 124 on a downstream side in airflow with respect to the heater core 18 and the lower bypass passage 124a.

The air flowing out of the face blowout port 12a is guided through a duct (not shown), and is blown out toward the face or trunk of an occupant seated in a front seat of the interior of the vehicle. The air flowing out of the defrosting blowout port 12b is guided through a duct (not shown) and blown out to a window glass of a front surface of the vehicle in the vehicle interior. The air discharged from the foot blow-out port 12c is guided through a duct (not shown) and blows out to the feet of the occupant seated on the front seat of the interior of the vehicle.

In addition, the face exhaust port 12a is provided with a face door 21, and the face door 21 opens and closes the face exhaust port 12a. The defrost blowout port 12b is provided with a defrost door 22, and the defrost door 22 opens and closes the defrost blowout port 12b. The foot blowout port 12c is provided with a foot door 23, and the foot door 23 opens and closes the foot blowout port 12c.

In addition, at a downstream side of the heater core in the air flow 18, in the first downstream-side ventilation path 123, warm air passing through the heater core 18 and cool air passing through the upper bypass passage 123a mix together. Then, the mixed air is mainly blown out from one opened out of the face blow-out port 12a and the defrosting blow-out port 12b into the inside of the vehicle.

In addition, on a downstream side of the heater core 18 in the air flow, in the lower bypass passage 124a, warm air passing through the heater core 18 and cool air passing through the lower bypass passage 124a are mixed with each other. Then, the mixed air is mainly blown out from the foot blow-out port 12c into the inside of the vehicle in a case where the foot blow-out port 12c is opened.

In addition, a ventilation path connection door 25 is provided on the downstream side in the air flow of the heater core 18 in the downstream side ventilation paths 123 and 124 . The ventilation path connection door 25 connects and disconnects a connection between two downstream side ventilation paths 123 and 124 on the downstream side in the air flow of the heater core 18.

For example, if the ventilation path communication door 25 is opened, the two downstream side ventilation paths 123 and 124 communicate with each other. In this case, the air passing through either or both of the heater core 18 and the upper bypass passage 123a in the first downstream side ventilation path 123 can flow not only to the face blow-out port 12a and the defrost blow-out port 12b but also to the foot -Exhaust connection 12c. The air passing through either or both of the heater core 18 and the lower bypass passage 124a in the second downstream side ventilation path 124 can flow not only to the foot blow-out port 12c but also to the face blow-out port 12a and the defrost blow-out port 12b.

In addition, if the ventilation path connection door 25 is closed, the connection between the two downstream side ventilation paths 123 and 124 is blocked. In this case, the air passing through either or both of the heater core 18 and the upper bypass passage 123a in the first downstream side ventilation path 123 cannot flow to the foot blowout port 12c. The air passing through either or both of the heater core 18 and the lower bypass passage 124a in the second downstream side ventilation path 124 cannot flow to the face blow-off port 12a and the defrost blow-off port 12b.

How out 1 and 2 As can be seen, the upstream-side guide member 26 is provided on one side in the axial direction of the fan DRa with respect to the blower fan 201 in the air-conditioning case 12 . In addition, the upstream-side guide member 26 is provided on a downstream side in air flow with respect to the first and second upstream-side ventilation paths 121 and 122, specifically, on the other side in the fan axial direction DRa. That is, the upstream-side guide member 26 is provided on the other side in the axial direction of the fan DRa with respect to the upstream-side partition wall 125 of the air-conditioning case 12 . The upstream side guide member 26 is fixed to the air conditioner case 12 .

The upstream-side guide member 26 guides the air that flows out of the first upstream-side ventilation path 121 and the second upstream-side ventilation path 122 and flows to the blower fan 201 from one side to the other side in the axial direction of the fan DRa. The guided air is sucked into the blower fan 201 through the fan suction hole 127a.

How additionally from 5 until 7 As can be seen, the upstream-side guide member 26 is formed of a disc-shaped member having a disc shape twisted centered on the fan axis CL1. In detail, the upstream-side guide member 26 has a shape in which the other side of the upstream-side guide member 26 in the axial direction of the fan DRa is twisted about the fan axis CL1 in an opposite direction to the rotation direction RTf of the blower fan 201 with respect to one side.

In addition, the upstream-side guide member 26 divides and divides air passages from the first and second upstream-side ventilation paths 121 and 122 to the blower fan 201 into a first upstream-side guide passage 261 and a second upstream-side guide passage 262 provided in parallel with each other. The upstream-side guide member 26 may be formed to completely separate the first upstream-side guide passage 261 and the second upstream-side guide passage 262 from each other, or may be a connection between the first upstream-side guide passage 261 and the second upstream guide passage 262 to some extent.

The first upstream guide passage 261 is located above the second upstream guide passage 262 with the upstream guide member 26 interposed therebetween. The air flows from the first upstream-side ventilation path 121 into the first upstream-side guide passage 261, and the air flows from the second upstream-side ventilation path 122 into the second upstream-side guide passage 262. The upstream-side guide member 26 supplies the air from a plurality of upstream-side guide passages 261 and 262 the blower fan 201 along the twisted shape of the upstream-side guide member 26 described above.

Note that the rotation direction RTf of the blower fan 201 is also referred to as a fan rotation direction RTf. In addition, the 5 until 7 Cross-sections cut in a plane whose normal direction is the axial direction of the fan DRa. In addition, a portion A1 of the upstream-side guide member 26 that is made of 5 and 6 as can be seen, the same portion as a cross-sectional portion A1 of the upstream guide member 26 shown in FIG 7 is evident. In addition, a portion A2 of the upstream-side guide member 26 indicated by a two-dot chain line in 5 is the same portion as a cross-sectional portion A2 of the upstream-side guide member 26, which consists of FIG 6 is evident.

Due to the twisted shape of the upstream-side guide member 26 as described above, the upstream-side guide member 26 guides the air flowing along the upstream-side guide member 26 so that the air flows in the opposite direction to the fan rotating direction RTf in a circumferential direction of the blower fan 201, when the air advances to the other side in the axial direction of the fan DRa.

For example, the upstream-side guide member 26 allows the air of the upstream-side guide passage 261 to flow as indicated by arrows F1a and F1b in FIG 2 is displayed. Namely, the upstream-side guide member 26 allows the air that flows out of the first upstream-side ventilation path 121 and flows along the upstream-side guide member 26 to flow in the opposite direction to the fan rotating direction RTf in the circumferential direction of the blower fan 201 when the air is directed to the other side in the axial direction of the fan DRa.

At the same time, the upstream-side guide member 26 allows the air of the second upstream-side guide passage 261 to flow as indicated by arrows F2a and F2b in FIG 2 is displayed. Namely, the upstream-side guide member 26 allows the air that flows out of the second upstream-side ventilation path 122 and flows along the upstream-side guide member 26 to flow in the opposite direction to the fan rotating direction RTf in the circumferential direction of the blower fan 201 when the air to the other side in the fan axial direction DRa.

It should be noted that the arrows F1a and F2a in FIG 2 indicate an air flow progressing along a surface of the upstream-side guide member 26 on a side of the upstream-side guide member 26 in the fan axial direction DRa. The arrows F1b and F2b in the 2 12 indicate an air flow progressing along a surface of the upstream-side guide member 26 on the other side of the upstream-side guide member 26 in the fan axial direction DRa.

How out 1 and 8th As can be seen, the upstream side partition wall 125 of the air conditioner casing 12 has the other end 125a on the other side in the fan axial direction DRa. In addition, the upstream-side guide member 26 has an end 26a on one side in the fan axial direction DRa.

Both of the other end 125a of the upstream-side partition wall 125 and one end 26a of the upstream-side guide member 26 are formed so as to extend in the vehicle width direction DR3. One end 26a of the upstream-side guide member 26 is arranged so as to align with the other end 125a of the upstream-side partition wall 125 in the fan axial direction DRa. One end 26a of the upstream-side guide member 26 may be separated from the other end 125a of the upstream-side partition wall 125 by a slight gap in the fan axial direction DRa, but in the present embodiment, one end 26a of the upstream-side guide member 26 is connected to the other end 125a of the upstream partition wall 125 connected.

Since the upstream-side guide member 26 and the upstream-side partition wall 125 are connected to each other as described above, the first upstream-side guide passage 261 is connected to the first upstream-side ventilation path 121 and is separated from the second upstream-side ventilation path 122 and the second upstream-side guide passage 262 . The second upstream-side guide passage 262 is connected to the second upstream-side ventilation path 122 and is separated from the first upstream-side ventilation path 121 and the first upstream-side guide passage 261 .

In addition, since the upstream-side guide member 26 is connected to the upstream-side partition wall 125, the upstream-side guide member 26 is provided from the other end 125a of the upstream-side partition wall 125 to the fan suction hole 127a in the fan axial direction DRa. In the fan axial direction DRa, the upstream-side guide member 26 may extend until the other end of the upstream-side guide member 26 enters the interior of the blower fan 201 through the fan suction hole 127a, or may stand up to the fan suction hole 127a.

How out 1 and 3 As can be seen, the plurality of the downstream side guide members 28 are provided in the air conditioner case 12 . The plurality of downstream-side guide members 28 are arranged on an airflow-downstream side with respect to the blower fan 201 and on an airflow-upstream side with respect to the first downstream-side ventilation path 123 and the second downstream-side ventilation path 124 . Note that a schematic external shape of the blower fan 201 is indicated by a two-dot chain line in FIG 3 is indicated, and the same applies to 13 , 16 and 18 to which will be described later.

As in particular from the 3 and 9 As can be seen, the plurality of the downstream-side guide members 28 are arranged outside of the blower fan 201 in the radial direction and are arranged side by side in the circumferential direction of the blower fan 201, respectively. Therefore, the plurality of downstream-side guide members 28 are arranged on one side in the fan axial direction DRa with respect to the first downstream-side ventilation path 123 , the second downstream-side ventilation path 124 , and the downstream-side partition wall 126 .

It should be noted that since the 9 a cross-section along line IX-IX of 1 12, the fan suction hole 127a and the upstream-side guide member 26 in FIG 9 are not shown, but in the 9 a fan suction hole 127a and the upstream-side guide member 26 are indicated by two-dot chain lines. the 9 12 is a view showing a relative positional relationship among the fan suction hole 127a, the upstream-side guide member 26, and the downstream-side guide member 28. FIG. The same applies 14 , 15 , 17 and 19 , which will be described later.

For example, in the present embodiment, two downstream-side guide members 28 are provided, and are provided side by side at an equal pitch in the circumferential direction of the blower fan 201 . Since the downstream-side guide members 28 are fixed to the air conditioner case 12, the downstream-side guide members 28 are arranged with a gap in the radial direction from the blower fan 201 so as not to collide with the blower fan 201 rotating.

The plurality of downstream-side guide members 28 guide the air discharged from the blower fan 201 to the first downstream-side ventilation path 123 and the second downstream-side ventilation path 124.

Specifically, the air discharged from the blower fan 201 flows from the inside in the radial direction of the fan with respect to the downstream-side guide members 28 along the downstream-side guide members 28. The air guided along the downstream-side guide members 28 flows to the other side in the axial direction DRa des fan to flow into the first downstream-side ventilation path 123 and the second downstream-side ventilation path 124 as it proceeds to the outside in the radial direction of the fan.

In this case, the plurality of downstream-side guide members 28 suppresses the rotating component, imparted by the rotation of the blower fan 201, of the flow velocity of the air that blows out of the blower fan 201 by allowing the air that blows out of the blower fan 201 to flow along the downstream guide elements 28 flows.

As in particular from the 3 , 9 and 10 As can be seen, each of the plurality of downstream-side guide members 28 has a disk shape intersecting the circumferential direction of the blower fan 201 . In addition, the downstream-side guide member 28 has a first guide surface 281 provided on one surface side of the disk shape and a second guide surface 282 provided on the other surface side of the disk shape.

The first guide surface 281 is one surface out of the two guide surfaces 281 and 282 that is directed to face the fan rotation direction RTf in the circumferential direction of the blower fan 201 . In contrast, the second guide surface 282 of the two guide surfaces 281 and 282 is a surface facing to an opposite side to the side to which the fan rotating direction RTf in the circumferential direction of the blower fan 201 is directed.

In detail, the downstream guide member 28 suppresses the rotating component of the flow velocity of the air discharged from the blower fan 201 by allowing the air discharged from the blower fan 201 to flow along the first guide surface 281 . Namely, the first guide surface 281 of the downstream-side guide member 28 functions to prevent the air outflow from the blower fan 201 from being allowed to flow in the circumferential direction of the blower fan 201 while allowing the air outflow from the blower fan 201 to flow toward the Outer flows in the radial direction of the fan.

In addition, each of the plurality of downstream-side guide members 28 has the other end 28a on the other side in the fan axial direction DRa. Therefore, the first guide surface 281 also has the other end 281a on the other side in the fan axial direction DRa, and the second guide surface 282 also has the other end 282a on the other side in the fan axial direction DRa. The other end 281a of the first guide surface 281 and the other end 282a of the second guide surface 282 are provided in the other end 28a of the downstream guide member 28 .

In addition, since the air flowing along the respective guide surfaces 281 and 282 flows to the downstream-side ventilation path 123 and 124 in the fan axial direction DRa with respect to the downstream-side guide members 28, the other end 281a of the first guide surface 281 is a downstream end of air flow along the first guide surface 281. The other end 282a of the second guide surface 282 is a downstream end of air flow along the second guide surface 282.

As additionally from the figures 3 and 10 As can be seen, the first guide surface 281 and the second guide surface 282 are inclined with respect to the fan axis CL1 so that they are positioned on a forward side in the fan rotating direction RTf to the other side in the fan axial direction DRa.

How from the 1 and 10 As can be seen, the downstream-side partition wall 126 of the air conditioner casing 12 has an end 126a on one side in the fan axial direction DRa. Both of one end 126a of the downstream-side partition wall 126 and the other end 28a of the downstream-side guide member 28 are formed so as to extend in the vehicle-width direction DR3. All of the other ends 28a of the plurality of downstream-side guide members 28 are aligned with one end 126a of the downstream-side partition wall 126 in the fan axial direction DRa. The other ends 28a of the downstream-side guide member 28 may be separated from one end 126a of the downstream-side partition wall 126 by a slight gap in the fan axial direction DRa, but in the present embodiment, both of the other ends 28a of the downstream-side guide members 28 have one end 126a the downstream side partition wall 126 connected.

Next, an operation of the vehicle air conditioning unit 10 will be described. The vehicle air conditioning unit 10 is switched and operated in one of a plurality of predetermined operating modes. For example, a case will be described in which the vehicle air conditioning unit 10 is operated in an inside/outside air two-layer mode in which inside air that is air inside the vehicle and outside air that is air outside the vehicle , flow separately.

In the inside/outside air two-layer mode, the ventilation path connecting door 25 is closed as shown in FIG 1 is evident. When the blower 20 is operated, the outside air is introduced into the first upstream-side ventilation path 121 indicated by an arrow FA1, and the inside air is introduced into the second upstream vent path 122 as indicated by an arrow FB1.

The outside air flowing through the first upstream-side ventilation path 121 passes through the filter 13 and is then guided to the upstream-side guide member 26 and sucked into the blower fan 201 . The outside air sucked into the blower fan 201 is blown out by the blower fan 201, guided to the downstream-side guide member 28, and flows into the first downstream-side ventilation path 123 as indicated by an arrow FA2.

In addition, the inside air flowing through the second upstream-side ventilation path 122 passes through the filter 13 and is then guided to the upstream-side guide member 26 and sucked into the blower fan 201 . The inside air sucked into the blower fan 201 is blown out of the blower fan 201, guided to the downstream-side guide member 28, and flows into the second downstream-side ventilation path 124 as indicated by an arrow FB2.

In this case, the outside air flowing out of the first upstream-side ventilation path 121 is guided to the respective guide members 26 and 28 such that the outside air hardly flows into the second downstream-side ventilation path 124 and only flows to the first downstream-side ventilation path 123 . At the same time, the inner air flowing out of the second upstream-side ventilation path 122 is guided to the corresponding guide members 26 and 28 such that the inner air hardly flows into the first downstream-side ventilation path 123 but only flows into the second downstream-side ventilation path 124 . Therefore, the outside air flowing from the first upstream-side ventilation path 121 to the first downstream-side ventilation path 123 and the inside air flowing from the second upstream-side ventilation path 122 to the second downstream-side ventilation path 124 are guided to the respective guide members 26 and 28 in such a manner that the outside air and the inside air flow accordingly without being substantially mixed with each other.

The outside air flowing through the first downstream-side ventilation path 123 passes through the evaporator 16 and then passes through each or one of the heater core 18 and the upper bypass passage 123a. The air passing through each or one of the heater core 18 and the upper bypass passage 123a is blown out from the opened exhaust port of the face exhaust port 12a and the defrost exhaust port 12b to a predetermined place in the interior of the vehicle as indicated by the arrows FA3 and FA4 is displayed.

In addition, the inside air flowing through the second downstream-side ventilation path 124 passes through the evaporator 16 and then passes through each or one of the heater core 18 and the lower bypass passage 124a. The air passing through each or one of the heater core 18 and the lower bypass passage 124a is blown out from the foot blowout port 12c to a predetermined location in the interior of the vehicle as indicated by an arrow FB3.

As described above, according to the present embodiment, as shown in FIGS 1 , 2 and 5 1, the shape in which the other side of the upstream-side guide member 26 in the fan axial direction DRa is rotated about the fan axis CL1 in the opposite direction to the fan rotating direction RTf with respect to the one side. The upstream-side guide member 26 supplies the air to the blower fan 201 along the twisted shape of the upstream-side guide member 26 .

Thus, the respective air flows flowing out of the first and second upstream-side ventilation paths 121 and 122 would be turned in the opposite direction to the fan rotating direction RTf in advance, and then flow into the blower fan 201 . This acts in a direction in which a phase shift around the axis CL1 of the fan, which occurs due to the rotation of the blower fan 201 in an alternating arrangement of a plurality of air flows, coming from the first and second upstream-side ventilation paths 121 and 122 to the first and second downstream-side Ventilation paths 123 and 124 flow, are generated, is canceled. Therefore, it is possible to suppress the phase shift.

How additionally from the 1 , 3 and 9 As can be seen, according to the present embodiment, the plurality of downstream-side guide members 28 allows the air discharged from the blower fan 201 to flow along the downstream-side guide members 28 . Thus, the plurality of downstream-side guide members 28 suppress the rotational component imparted by the rotation of the blower fan 201, the Flow speed of the air flowing out of the blower fan 201.

Therefore, compared to a case where the downstream-side guide members 28 are not provided, it becomes difficult for the air flowing out of the blower fan 201 to advance in the fan rotating direction RTf before flowing into the first and second downstream-side ventilation paths 123 and 124 . For this reason, it is possible to suppress the phase shift around the axis CL1 of the fan generated due to the rotation of the blower fan 201 in the alternate arrangement of the plurality of airflows discharged from the first and second upstream-side ventilation paths 121 and 122 to the first and second downstream ventilation paths 123 and 124 flow.

As such, by adjusting the phase shift by the upstream-side guide member 26 and the downstream-side guide members 28, it is possible to allow the plurality of airflows to flow from the fan 28 in a predetermined direction while the mixing of the plurality of airflows is suppressed. For example, in the present embodiment, the phase shift is adjusted to be substantially zero.

In addition, it is possible to smoothly guide the air flow in which the phase shift is adjusted, regardless of whether the upstream-side guide member 26 or the downstream-side guide member 28 is used.

Here, when a blow-out mode in the inside-outside air dual-layer mode is a foot/defrost mode, the outside air flows from the first upstream-side ventilation path 121 to the first downstream-side ventilation path 123 to prevent the glass from fogging. At the same time, the inside air flows from the second upstream-side ventilation path 122 to a second downstream-side ventilation path 124 to reduce ventilation loss. Therefore, normally, in a case where a usage mode of the vehicle air-conditioning unit 10 is the inside-outside air two-layer mode and the foot/defrosting mode, the separating ability of the plurality of air flows flowing from the upstream-side ventilation paths 121 and 122 to the downstream-side ventilation paths 123 and 124 streams, most needed.

In the present embodiment, a total phase matching angle by the upstream-side guide member 26 and the downstream-side guide member 28 is calculated from a ratio between a fan speed frequency and an air volume at an operation point in the use mode where the separability of the plurality of air flows is most required. The total phase-matching angle is an angle obtained by counting an upstream-side phase-matching angle by the upstream-side guide member 26 and a downstream-side phase-matching angle by the downstream-side guide member 28 . The upstream phase matching angle is an angle by which the upstream guide member 26 reduces the phase shift about the axis CL1 of the fan generated in the mutual arrangement of the plurality of airflows. The downstream phase-matching angle is an angle by which the downstream guide member 28 reduces the phase shift about the axis CL1 of the fan.

For example, the total phase matching angle is determined from a phase shift amount due to the rotation of the blower fan obtained from the relationship between the fan speed frequency and the air volume at the operating point in the use mode, and the upstream phase matching angle and the downstream phase matching angle are determined from the total phase matching angle . In this case, since an influence on a pressure loss is larger on an outlet side of the blower fan 201 than on an inlet side of the blower fan 201, it is determined that the upstream-side phase matching angle is determined larger than the downstream-side phase matching angle in view of a reduction in the pressure loss.

For example, a twist angle AGt der 5 in the twisted shape of the upstream guide member 26 is determined based on the upstream phase matching angle. In addition, a shape of the downstream-side guide member 28 such as an inclination with respect to the axis CL1 of the fan or the like is determined based on the downstream-side phase matching angle.

How additionally from the 1 As can be seen, in the present embodiment, the phase shift is suppressed by both the upstream-side guide member 26 and the downstream-side guide member 28, and a sudden change in ventilation paths is suppressed in comparison with a case where the phase shift is suppressed only by any one of the upstream-side guide member 26 and the downstream-side guide member 28 . As a result, it is possible to suppress an increase in the pressure loss of the airflow due to the phase shift suppression.

In addition, the upstream-side guide member 26 and the downstream-side guide member 28 are fixed to the air conditioner case 12 . Namely, an actuator for operating the upstream-side guide member 26 or the downstream-side guide member 28 is not provided. Therefore, a space occupied by the actuator can be reduced, and a size of the vehicle air conditioning unit 10 in a vehicle front-rear direction DR1 can be suppressed.

In addition, since both of the upstream-side guide member 26 and the downstream-side guide member 28 are fixed to the air conditioner case 12, it is easy to improve sealing ability between each of the upstream-side guide member 26 and the downstream-side guide member 28 and the air conditioner case 12. For this reason, it is possible to improve the separability of the plurality of air flows guided to the upstream-side guide member 26 and the downstream-side guide member 28 .

In addition, according to the present embodiment, as shown in FIGS 1 and 8th As can be seen, the upstream-side partition wall 125 is disposed between the first upstream-side ventilation path 121 and the second upstream-side ventilation path 122 and partitions between the first upstream-side ventilation path 121 and the second upstream-side ventilation path 122 . One end 26a of the upstream-side guide member 126 is arranged so as to align with the other end 125a of the upstream-side partition wall 125 in the fan axial direction DRa. In detail, the upstream-side guide member 26 is connected to the upstream-side partition wall 125 . Therefore, in a process until the air flowing out of the first and second upstream-side ventilation paths 121 and 122 is guided to the upstream-side guide member 26, it becomes easy to suppress that the air from the first upstream-side ventilation path 121 and the air from the second upstream-side Ventilation path 122 are mixed together.

In addition, according to the present embodiment, as is apparent from FIGS 1 and 3 as can be seen, the blower fan 201 is the centrifugal fan. The plurality of downstream-side guide members 28 are arranged outside of the blower fan 201 in the radial direction and are arranged side by side in the circumferential direction of the blower fan 201 . Therefore, it is possible to suppress the air conditioner case 12 from becoming longer in the axial direction DRa due to the provision of the downstream-side guide members 28 in the air conditioner case 12 .

In addition, according to the present embodiment, as shown in FIG 3 , 9 and 10 As can be seen, the plurality of downstream-side guide members 28 have the first guide surfaces 281 facing to the side facing the fan rotating direction RTf in the circumferential direction of the blower fan 201 . The downstream-side guide member 28 suppresses the rotating component of the flow velocity of the air that blows out of the blower fan 201 by allowing the air that blows out of the blower fan 201 to flow along the first guide surface 281 . In addition, the other end 281a of the first guide surface 281 is a downstream end of an air flow along the first guide surface 281. In addition, the first guide surface 281 is inclined with respect to the fan axis CL1 so as to be on the front direction side in the rotating direction RTf of the fan is positioned to the other side in the fan axial direction DRa.

Because of this, it is possible to smoothly suppress the rotating component present in the air flow discharged from the blower fan 201 . For example, the flow speed of the air flow on the outlet side of the blower fan 201 is high, but if a direction of the air flow from such a high flow speed turns in the opposite direction to the rotating direction RTf of the fan, a large pressure loss in the air flow occurs. In this regard, if the first guide surface 281 is inclined with respect to the fan axis CL1 described above, the direction of the airflow out of the blower fan 201 does not turn to the opposite direction to the fan rotating direction RTf, and it is thus possible to avoid occurrence of such a large pressure loss.

In addition, according to the present embodiment, how off 1 and 10 seen, the downstream partition wall 126 arranged between the first downstream-side ventilation path 123 and the second downstream-side ventilation path 124 , and splits between the first downstream-side ventilation path 123 and the second downstream-side ventilation path 124 . All of the other ends 28a of the plurality of downstream-side guide members 28 are arranged to align with one end 126a of the downstream-side partition wall 126 in the fan axial direction DRa. In detail, all of the plurality of downstream-side guide members 28 are connected to the downstream-side partition wall 126 . Therefore, before the air guided to the downstream-side guide members 28 flows into the first and second downstream-side ventilation paths 123 and 124, it becomes easy to suppress the air flowing into the first downstream-side ventilation path 123 and the air flowing into the second downstream-side ventilation path 124 from mixing with each other will.

(Second embodiment)

Next, a second embodiment will be described. In the present embodiment, portions different from those of the first embodiment described above will be mainly described. In addition, description for the same or equivalent parts as those of the embodiment described above will be omitted or simplified. The same applies to a description of the embodiments that will be described later.

How from the 11 As can be seen, an upstream guide member 26 of the present embodiment has two disc shapes 2 which are twisted centered on an axis CL1 of the fan, and the two disc shapes intersect and couple to each other. Therefore, in the present embodiment, the upstream-side guide member 26 divides and divides a first upstream-side guide passage 261 into two upstream-side guide passages 261a and 261b provided in parallel with each other. The upstream-side guide member 26 divides and partitions a second upstream-side guide passage 262 into two upstream-side guide passages 262a and 262b provided in parallel with each other. The upstream guide member may be formed to completely partition a plurality of upstream guide passages 261a, 261b, 262a and 262b from each other, or may possibly allow communication between the plurality of upstream guide passages 261a, 261b, 262a and 262b to some extent.

A total number of the upstream-side guide passages 261a, 261b, 262a and 262b of the present embodiment formed as described above is 4. On the other hand, a total number of upstream-side ventilation paths 121 and 122 provided in an air conditioning case 12 is two. Therefore, in the present embodiment, the number of a plurality of upstream-side guide passages 261a, 261b, 262a, and 262b is larger than that of a plurality of upstream-side ventilation paths 121 and 122.

Thus, for example, compared to a case where the number of the plurality of upstream-side guide passages is the same as that of the plurality of upstream-side ventilation paths, it becomes easy to all airflows flowing out of the plurality of upstream-side ventilation paths 121 and 122 according to the twisted shape of the upstream guide member 26 about the axis CL1 of the fan.

The present embodiment is the same as the first embodiment except for the above. In the present embodiment, effects obtained from a configuration common to the first embodiment can be obtained similarly to the first embodiment.

(Third embodiment)

Next, a third embodiment will be described. In the present embodiment, portions different from those of the first embodiment described above will be mainly described.

How from the 12 until 14 As can be seen, in the present embodiment, downstream-side guide members 28 are arranged outside of a blower fan 201 in a radial direction and have a disc shape provided so as to intersect a circumferential direction of the blower fan 201, which is similar to the first embodiment. Therefore, the downstream-side guide member 28 of the present embodiment has a first guide surface 281 and a second guide surface 282 similarly to the first embodiment. However, in the present embodiment, the number of the downstream-side guide members 28 is larger than that in the first embodiment, and a shape of each of the downstream-side guide members 28 is different from that in the first embodiment.

As in particular from the 13 until 15 As can be seen, each of a plurality of downstream-side guide members 28 is curved to be positioned on a front side of a rotating direction RTf of the fan toward the outside in a radial direction of the fan. The shape of the downstream-side guide member 28 is a curved shape with the first guide surface 281 made of a convex surface and the second guide surface 282 made of a concave surface. An arrow fo in the 14 denotes an air flow blown out of the blower fan 201 and guided along the downstream guide member 28 .

In addition, a shape of the downstream side guide member 28 in a fan axial direction DRa is as follows. Additionally, as from the 14 and 15 As can be seen, each of the downstream side guide members 28 having the disk shape is inclined with respect to the fan axis CL1 so that it is on the front direction side in the fan rotating direction RTf to the other side in the axial direction DRa of the fan are positioned. In other words, each of the first guide surface 281 and the second guide surface 282 is inclined with respect to the fan axis CL1 so as to be on the front direction side in the fan rotating direction RTf to the other side in the axial direction DRa of the fan is positioned. In this regard, the downstream-side guide member 28 of the present embodiment is similar to that of the first embodiment.

It is to be noted that a portion C1 of the downstream-side guide member 28 indicated by a two-dot chain line in FIG 15 is indicated is the same portion as a cross-sectional portion C1 of the downstream-side guide member 28 shown in FIG 14 is evident. That's how it is 12 , 14 and 15 can be seen, as a cross-sectional position where the downstream-side guide member 28 is cut is shifted to the other side in the fan axial direction DRa, a cross-sectional portion of the cut downstream-side guide member 28 is to the front direction side in the fan rotating direction RTf shifted as indicated by an arrow Ba.

The present embodiment is the same as the first embodiment except for the above. In the present embodiment, effects obtained from a configuration common to the first embodiment can be obtained, which is similar to the first embodiment.

In addition, according to the present embodiment, as can be seen from FIGS 13 until 15 As can be seen, each of the plurality of downstream-side guide members 28 has the disk shape provided so as to intersect the circumferential direction of the blower fan 201 . Each of the plurality of downstream-side guide members 28 is bent so as to be positioned on the side in the front direction in the fan rotating direction RTf toward the outside in the fan radial direction. Therefore, when the air discharged from the blower fan 201 moves to the outside in the radial direction of the fan, it is possible to smoothly reduce a rotating component present in the flow speed of the air.

In addition, according to the present embodiment, a large number of downstream-side guide members 28 that guide the air flow and form the disk shape are provided radially. Because of this, it is possible to allow the downstream-side guide members 28 to exhibit a straightening effect to reduce a deviation of a mass flow rate of the air. More specifically, the straightening effect is an effect of suppressing an increase in a variation in the mass flow rate due to the fact that the mass flow rate of the air near the downstream-side guide members 28 becomes high. By allowing the downstream-side guide members 28 to exhibit such a straightening effect, it is possible to achieve space saving and low pressure loss.

Note that the present embodiment is a modification from the first embodiment, but it is also possible to combine the present embodiment with the second embodiment described above.

(Fourth embodiment)

Next, a fourth embodiment will be described. In the present embodiment, portions different from those of the first embodiment described above will be mainly described.

How from the 16 and 17 As can be seen, in the present embodiment, downstream guide members 28 are outside of a blower fan 201 in a radial direction and has a first guide surface 281 and a second guide surface 282 similarly to the first embodiment. Each of the first guide surface 281 and the second guide surface 282 is inclined with respect to the fan axis CL1 so as to be positioned on one side in a front direction in a fan rotating direction RTf to the other side in a fan axial direction DRa is. However, in the present embodiment, a shape of the downstream-side guide member 28 is different from that of the first embodiment.

Specifically, each of the plurality of downstream-side guide members 28 has a shape gradually expanding in a circumferential direction of the blower fan 201 toward an outer side of a radial direction of the fan. In short, a width Wr of the downstream-side guide member 28 in the circumferential direction becomes wide toward the outside in the radial direction of the fan. Therefore, it is possible to suppress occurrence of turbulence such as a vortex or the like in an air flow along the downstream-side guide member 28 . It is noted that an arrow Fo in the 17 indicates an air flow blown out of the blower fan 201 and guided along the downstream guide member 28 .

The present embodiment is the same as the first embodiment except for the above. In the present embodiment, effects obtained from a configuration common to the first embodiment, which is similar to the first embodiment, can be obtained.

Note that the present embodiment is a modification based on the first embodiment, but it is possible to combine the present embodiment with the second embodiment described above.

(Fifth embodiment)

Next, a fifth embodiment will be described. In the present embodiment, portions different from those of the first embodiment described above will be mainly described.

How from the 18 and 19 As can be seen, a total of four downstream guide members 28 are provided in the present embodiment. In this respect, the present embodiment is different from the first embodiment.

In addition, a plurality of downstream guide members 28 of the present embodiment are provided side by side at an unequal pitch in a circumferential direction of a blower fan 201 . It should be noted that an arrow Fo in the 19 indicates an air flow blown out of the blower fan 201 and guided along the downstream guide member 28 .

The present embodiment is the same as the first embodiment except for the above. In the present embodiment, effects obtained from a configuration common to the first embodiment, which is similar to the first embodiment, can be obtained.

Note that the present embodiment is a modification from the first embodiment, but it is possible to combine the present embodiment with the second embodiment described above or the fourth embodiment described above.

(Other embodiments)

(1) In each of the above-described embodiments, as can be seen from FIG 1 and the like, the vehicle air-conditioning unit 10 has both the upstream-side guide member 26 and the downstream-side guide member 28, but it is also desirable that the vehicle air-conditioning unit 10 has one of the upstream-side guide member 26 and the downstream-side guide member 28 and the other of the upstream-side guide member 26 and the downstream-side guide member 28 does not have.

(2) In each of the above-described embodiments, as can be seen from FIGS 5 and 8th As can be seen, one end 26a of the upstream-side guide member 26 is arranged to be aligned with the other end 125a of the upstream-side partition wall 125 in the fan axial direction DRa, but is not limited thereto.

(3) In each of the above-described embodiments, as can be seen from FIG 10 As can be seen, all of the other ends 28a of the plurality of downstream-side guide members 28 are arranged with one end 126a of the downstream-side partition wall 126 in the axial direction To be aligned with the fan, but are not limited to this. For example, it is also desirable that some or all of the plurality of downstream-side guide members 28 are provided such that the other ends 28a thereof are arranged at positions shifted with respect to one end 126a of the downstream-side partition wall 126 in the circumferential direction of the blower fan 201 are.

(4) In the first embodiment described above, as is apparent from FIGS 5 until 7 As can be seen, the upstream guide member 26 has the shape twisted centered on the fan axis CL1, but the twisted shape need not be precisely centered on the fan axis CL1. Briefly, the twisted shape centered on the fan axis CL1 may be generally centered on the fan axis CL1. The same applies to each embodiment after the second embodiment.

(5) In each of the above-described embodiments, as can be seen from FIG 1 and the like, the axial direction DRa of the fan coincides with the vehicle front-rear direction DR1, but is not limited thereto, for example, the blower fan 201 may be provided so that the fan axis CL1 with respect to FIG the vehicle front-rear direction DR1 is inclined.

(6) In the fourth embodiment described above, as is apparent from FIG 17 As can be seen, an outer shape of the air conditioner case 12 is formed independently of a shape of the downstream-side guide members 28 at locations where the downstream-side guide members 28 are provided, but this is an example. For example, the outer shape of the air conditioner case 12 may be recessed inward in the fan radial direction following the shape of the downstream-side guide members 28 .

(7) In each of the above-described embodiments, as can be seen from FIG 1 As can be seen, the downstream-side guide members 28 are arranged outside of the blower fan 201 in the radial direction and are provided to be aligned with the blower fan 201 in the fan radial direction, but this is an example. Like for example from the 20 As can be seen, the downstream-side guide members may be arranged so as to be shifted to the other side in the fan axial direction DRa with respect to the blower fan 201 . In the 20 For example, the downstream-side guide members 28 are not aligned with the blower fan 201 in the radial direction of the fan.

(8) In each of the above-described embodiments, as can be seen from FIG 1 As can be seen, both the evaporator 16 and the heater core 18 are arranged on the downstream side in the airflow with respect to the blower fan 201, but this is an example. For example, the evaporator 16 and the heater core 18 may be disposed on the air flow upstream side with respect to the blower fan 201 . Alternatively, the evaporator 16 may be provided on the air flow upstream side with respect to the blower fan 201 , and the heater core 18 may be provided on the air flow downstream side with respect to the blower fan 201 .

(9) In each of the above-described embodiments, as can be seen from FIGS 3 and 10 and the like, the first and second guide surfaces 281 and 282 of the downstream-side guide member 28 are inclined with respect to the fan axis CL1 so as to be on the front direction side in the fan rotation direction RTf to the other side in the axial direction To be positioned DRa of the fan. However, this is an example.

For example, it is also desirable that the first and second guide surfaces 281 and 282 are not inclined with respect to the fan axis CL1 and are surfaces parallel to the fan axis CL1. In addition, as another example, it is also desirable that the first and second guide surfaces 281 and 282 are inclined with respect to the fan axis CL1 so as to be on one side in the opposite direction to the fan rotating direction RTf to the other side are positioned in the axial direction DRa of the fan. The reason is that even in this case, the downstream-side guide members 28 can suppress the rotating component imparted by the rotation of the blower fan 201 to the flow speed of the air flow discharged from the blower fan by allowing the air discharged from the blower fan 201 along the downstream guide elements 28 flows.

It should be noted that the rotating component imparted by the rotation of the blower fan 201 is due to the rotation of the blower fan 201, and thus a rotating component with the direction of rotation RTf of the fan from the positive direction is the is centered on the fan axis CL1. Therefore, the suppression of the rotating component imparted by the rotation of the blower fan 201 involves not only making the rotating component close to 0, but also changing the rotating component to a rotating component in a negative direction, namely changing of the rotating component to a rotating component in the opposite direction to the direction of rotation RTf of the fan.

(10) In each of the embodiments described above, such as from 1 As can be seen, the blower fan 201 is, but not limited to, the centrifugal fan, but may be, for example, an axial fan or a mixed flow fan.

(11) In the first embodiment described above, as is apparent from FIGS 1 and 8th As can be seen, the upstream guide member 26 is connected to the upstream partition wall 125 . For this reason, the upstream-side guide member 26 separates and separates the air flowing out of the first upstream-side ventilation path 121 and the air flowing out of the second upstream-side ventilation path 122, but this may not be necessary. The same applies to each embodiment after the second embodiment.

(12) In the first embodiment described above, as is apparent from FIGS 1 and 10 As can be seen, all of the other ends 28a of the plurality of downstream guide members 28 are connected to one end 126a of the downstream partition wall 126, but this is an example. For example, it is also desirable that some or all of the other ends 28a of the downstream guide members 28 are not connected to an end 126a of the downstream partition wall 126 .

(13) In the first embodiment described above, as is apparent from FIGS 1 and 10 As can be seen, the downstream guide member 28 is connected to the downstream partition wall 126 . For this reason, the downstream-side guide member 28 separates and separates the air flowing out of the first downstream-side ventilation path 123 and the air flowing out of the second downstream-side ventilation path 124, but this may not be necessary. The same applies to each embodiment after the second embodiment.

(14) In each of the embodiments as described above, as shown in FIG 1 and the like, the number of the plurality of upstream side ventilation paths 121 and 122 formed in the air conditioner case 12 is two, but may be three or more. The same applies to the number of the plurality of downstream-side ventilation paths 123 and 124.

(15) It should be noted that the present disclosure is not limited to the embodiment described above but can be variously modified. In addition, the respective embodiments described above are not irrelevant to each other, but may be appropriately combined with each other as long as such combination is not clearly impossible. In addition, it is needless to say that in each of the above-described embodiments, the elements that make up the embodiment are not necessarily essential unless otherwise described as essential and unless clearly considered essential in principle.

In addition, in each of the above-described embodiments, in a case where numerical values such as the number, numerical values, amounts, ranges and the like of component parts of the embodiment are mentioned, they are not limited to the specific number unless otherwise is described as essential and so long as this is not clearly limited to certain numbers in principle. In addition, in each of the above-described embodiments, when materials, shapes, positional relationships, and the like of the components and the like are mentioned, they are not limited to these materials, shapes, positional relationships, and the like, unless otherwise specified, and unless otherwise specified, to specific materials , shapes, positional relationships and the like is limited.

(Summary)

According to a first aspect shown in some or all of the respective embodiments described above, the upstream-side guide member is provided on a side in the axial direction of the fan axis with respect to the blower fan in the air-conditioning case. The upstream-side guide member guides the air flowing out of the first upstream-side ventilation path and the second upstream-side ventilation path and flowing from one side to the other side, which is an opposite side to one side, toward the blower fan in the axial direction. In addition, the upstream-side guide has the shape in which the other side of the upstream-side guide ing member is twisted in the axial direction about the axis of the fan in the opposite direction to the direction of rotation of the blower fan with respect to the one side, and guides the air along the twisted shape to the blower fan.

In addition, according to a second aspect, the upstream-side guide member guides the air flowing along the upstream-side guide member so that the air flows in the opposite direction to the rotational direction of the blower fan in the circumferential direction of the blower fan when the air advances to the other side in the axial direction. Therefore, the respective air flows that flow out of the first and second upstream-side ventilation paths are turned in the opposite direction to the rotating direction of the blower fan in advance, and then flow into the blower fan. This acts in a direction in which the phase shift around the axis of the fan generated due to the rotation of the blower fan in the alternating arrangement of the plurality of airflows flowing from the first and second upstream-side ventilation paths is canceled. Therefore, it is possible to suppress the phase shift.

In addition, according to a third aspect, the air conditioner case has the upstream-side partition wall. The upstream-side partition wall is arranged between the first upstream-side ventilation path and the second upstream-side ventilation path, and partitions between the first upstream-side ventilation path and the second upstream-side ventilation path. The upstream-side guide member is connected to the upstream-side partition wall. Therefore, in a process until the air flowing out of the first and second upstream-side ventilation paths is guided to the upstream-side guide member, it becomes easy to suppress that the air from the first upstream-side ventilation path and the air from the second upstream-side ventilation path are mixed with each other.

In addition, according to a fourth aspect, the upstream-side partition wall has the other end on the other side in the axial direction and is located on one side in the axial direction with respect to the upstream-side guide member. The upstream-side guide member has one end on one side in the axial direction, and one end of the upstream-side guide member is arranged to align with the other end of the upstream-side partition wall in the axial direction. Even in this case, similar to the third aspect, in a process until the air flowing out of the first and second upstream-side ventilation paths is guided to the upstream-side guide member, it becomes easy to suppress that the air from the first upstream-side ventilation path and the air from mixed together in the second upstream vent path.

In addition, according to a fifth aspect, the upstream-side guide member divides and subdivides air passages from the plurality of upstream-side ventilation paths to the blower fan into a plurality of upstream-side guide passages provided in parallel with each other. The number of the plurality of upstream-side guide passages is greater than that of the plurality of upstream-side ventilation paths. According to such a configuration, for example, compared with a case where the number of the plurality of upstream-side guide passages is the same as that of the plurality of upstream-side ventilation paths, it becomes easy to all airflows flowing out of the plurality of upstream-side ventilation paths to the To rotate fan axis according to the twisted shape of the upstream guide member.

In addition, according to a sixth aspect, the plurality of downstream-side guide members are provided in the air conditioner case, and guide the air outflow from the blower fan to the first downstream-side ventilation path and the second downstream-side ventilation path. The plurality of downstream-side guide members suppresses the rotating component imparted by the rotation of the blower fan to the flow velocity of the air discharged from the blower fan by allowing the air discharged from the blower fan to flow along the downstream-side guide members. The same applies to a seventh aspect.

In addition, according to an eighth aspect, the blower fan is the centrifugal fan. The plurality of downstream-side guide members are arranged outside of the blower fan in the radial direction and arranged side by side in the circumferential direction of the blower fan. According to such a configuration, it is possible to suppress the air conditioner case from being thrown in the axial direction due to the Provision of the downstream-side guide elements in the air conditioning housing becomes longer.

In addition, according to a ninth aspect, each of the plurality of downstream-side guide members has the disc shape provided to intersect the circumferential direction of the blower fan and is bent so that it is on the side in the front direction in the rotation direction of the blower fan to the outside is positioned in the radial direction of the blower fan. Therefore, when the air flowing out of the blower fan moves to the outside in the radial direction of the blower fan, it is possible to smoothly suppress the rotating component present in the flow speed of the air.

In addition, according to a tenth aspect, each of the plurality of downstream-side guide members is formed so as to be widened in the circumferential direction of the blower fan toward the outside in the radial direction of the blower fan. Therefore, it is possible to suppress the occurrence of the turbulence such as the vortex or the like in the air flow along the downstream-side guide member.

In addition, according to the eleventh aspect, the plurality of downstream-side guide members have the guide surface facing the side facing the rotating direction of the blower fan in the circumferential direction of the blower fan, and suppress the rotating component by making it flow out of the blower fan Allow air to flow along the guiding surface. The guide surface has the other end on the other side that is an opposite side to the one side in the axial direction, and the other end of the guide surface is the downstream end of air flow along the guide surface. The guide surface is inclined with respect to the fan axis so that it is inclined on the side in the front direction in the rotation direction of the blower fan to the other side in the axial direction.

Because of this, it is possible to smoothly suppress the rotating component present in the air discharged from the blower fan. For example, the flow speed of the air flow at the outlet side of the blower fan is high, but if the direction of the air flow of such a high flow speed turns to the opposite direction of the rotating direction of the blower fan, a large pressure loss in the air flow occurs. In this regard, if the guide surface is inclined with respect to the fan axis described above, the direction of the air flowing out of the blower fan does not turn to the opposite direction to the rotating direction of the blower fan, and it is thus possible to avoid occurrence of such a large pressure loss .

In addition, according to a twelfth aspect, the air conditioner case has the downstream-side partition wall. The downstream-side partition wall is arranged between the first downstream-side ventilation path and the second downstream-side ventilation path, and partitions between the first downstream-side ventilation path and the second downstream-side ventilation path. Some or all of the plurality of downstream guide members are connected to the downstream partition wall. Therefore, before the air guided to the downstream-side guide members flows into the first and second downstream-side ventilation paths, it becomes easy to suppress the air flowing into the first downstream-side ventilation path and the air flowing into the second downstream-side ventilation path from being mixed with each other.

In addition, according to the thirteenth aspect, the downstream-side partition wall has an end on one side in the axial direction. Each of the plurality of downstream-side guide members has the other end on the other side in the axial direction, and is arranged on one side in the axial direction with respect to the downstream-side partition wall. Some or all of the other ends of the plurality of downstream-side guide members are arranged to align with one end of the downstream-side partition wall in the axial direction. Even in this case, similarly to the twelfth aspect, before the air guided to the downstream-side guide members flows into the first and second downstream-side ventilation paths, it becomes possible to suppress the air flowing into the first downstream-side ventilation path and the air flowing into the second downstream-side ventilation path air are mixed together.

Claims (13)

An air conditioning unit for a vehicle, comprising: an air conditioning case (12) defining therein a first upstream ventilation path (121) through which air flows, a second upstream ventilation path (122) through which air flows and which is in parallel with the first upstream ventilation path , a first downstream ventilation path (123) through which the air discharged from the first upstream ventilation path flows, and a second downstream ventilation path (124) which is parallel to the first downstream ventilation path and through which the air discharged from the second upstream ventilation path flows; a blower (20) having a blower fan (201) rotating around a fan axis (CL1) in the air-conditioning case, the blower blowing air discharged from the first upstream-side ventilation path and the second upstream-side ventilation path from one side in an axial direction (DRa ) the fan axis retracts by rotation of the blower fan, the blower causing the drawn air to flow to the first downstream-side ventilation path and the second downstream-side ventilation path; and an upstream-side guide member (26) disposed on one side of the blower fan in the axial direction in the air-conditioning case, and the air flowing out of the first upstream-side ventilation path and the air flowing out of the second upstream-side ventilation path from one side to the other side , which is opposite to the one side in the axial direction, leads to the blower fan, the upstream-side guide member having a twisted shape in which the other side of the upstream-side guide member in the axial direction relative to the one side thereof around the fan axis in one direction is twisted opposite to a rotating direction (RTf) of the blower fan, and the upstream-side guide member guides the air to the blower fan along the twisted shape. Air conditioning unit for a vehicle claim 1 wherein the upstream-side guide member supplies the air so that the air flows in the direction opposite to the rotation direction of the blower fan in a circumferential direction of the blower fan when the air advances to the other side of the axial direction. Air conditioning unit for a vehicle claim 1 or 2 wherein the air conditioner case has an upstream-side partition wall (125) provided between the first upstream-side ventilation path and the second upstream-side ventilation path to partition the first upstream-side ventilation path and the second upstream-side ventilation path, and the upstream-side guide member is connected to the upstream-side partition wall. Air conditioning unit for a vehicle claim 1 or 2 wherein the air conditioner case has an upstream-side partition wall (125) provided between the first upstream-side ventilation path and the second upstream-side ventilation path to partition between the first upstream-side ventilation path and the second upstream-side ventilation path, the upstream-side partition wall having another end (125a). the other side of the axial direction and is provided on the one side of the upstream-side guide member in the axial direction, the upstream-side guide member has one end (26a) on the one side of the axial direction, and the one end of the upstream-side guide member with the other end of the upstream-side partition wall is aligned in the axial direction. Air conditioning unit for a vehicle according to any one of Claims 1 until 4 , further comprising a plurality of upstream-side ventilation paths (121, 122) including the first upstream-side ventilation path and the second upstream-side ventilation path, the plurality of upstream-side ventilation paths being defined in the air-conditioning case at positions upstream of the upstream-side guide member, and air flowing through the plurality of upstream-side ventilation paths flows, wherein the upstream-side guide member divides an air passage from the plurality of upstream-side ventilation paths to the blower fan into a plurality of upstream-side guide passages (261a, 261b, 262a, 262b) which are parallel to each other, and the number of the plurality of upstream-side guide passages is greater than that of the plurality of upstream-side ventilation paths. Air conditioning unit for a vehicle according to any one of Claims 1 until 5 , further comprising: a plurality of downstream-side guide members (28) that are provided in the air conditioner case and that guide air outflow from the blower fan to the first downstream-side ventilation path and the second downstream-side ventilation path, the plurality of downstream-side guide members being configured as a rotating component to decrease, which is imparted by the rotation of the blower fan of a flow speed of the air flowing out of the blower fan by the air along the plurality of the downstream-side guide elements. Air conditioning unit for a vehicle, comprising: an air conditioning case (12) defining therein a first upstream side ventilation path (121) through which air flows, a second upstream side ventilation path (122) through which air flows and which is in parallel with the first upstream side ventilation path, a first downstream ventilation path ( 123) through which the air discharged through the first upstream-side ventilation path flows, and a second downstream-side ventilation path (124) which is parallel to the first downstream-side ventilation path and through which the air discharged from the second upstream-side ventilation path flows; a blower (20) having a blower fan (201) rotating around a fan axis (CL1) in the air-conditioning case, the blower blowing air discharged from the first upstream-side ventilation path and the second upstream-side ventilation path from one side in an axial direction (DRa ) the fan axis retracts by rotation of the blower fan, the blower causing the drawn air to flow to the first downstream-side ventilation path and the second downstream-side ventilation path; and a plurality of downstream-side guide members (28) provided in the air-conditioning case and guiding air flowing out of the blower fan to the first downstream-side ventilation path and the second downstream-side ventilation path, wherein the blower fan is a centrifugal fan, and the plurality of downstream-side guide members are provided outside the blower fan in a radial direction and arranged side by side along a circumferential direction of the blower fan, the plurality of downstream-side guide members is configured to reduce a rotating component imparted by rotation of the blower fan to a flow speed of air discharged from the blower fan by guiding the air discharged from the blower fan along the plurality of downstream-side guide members. Air conditioning unit for a vehicle claim 6 wherein the blower fan is a centrifugal fan, and the plurality of downstream-side guide members are provided outside of the blower fan in a radial direction and arranged side by side along a circumferential direction of the blower fan. Air conditioning unit for a vehicle claim 7 or 8th , wherein each of the plurality of downstream-side guide members has a disk shape intersecting the circumferential direction of the blower fan, and each of the plurality of downstream-side guide members is curved so that an outward portion of each of the plurality of downstream-side guide members in the radial direction of the blower fan is positioned on a front side of a rotation direction (RTf) of the blower fan. Air conditioning unit for a vehicle claim 7 or 8th , wherein each of the plurality of downstream-side guide members has a shape gradually expanding in the circumferential direction of the blower fan toward an outward side of the radial direction of the blower fan. Air conditioning unit for a vehicle according to any one of Claims 6 until 10 , wherein each of the plurality of downstream-side guide members has a guide surface (281) directed to face the rotating direction (RTf) of the blower fan in the circumferential direction of the blower fan, wherein each of the plurality of downstream-side guide members is configured to guide the rotating component of the air discharged from the blower fan along the guide surface, the guide surface has another end (281a) on the other side opposite to the one side of the axial direction, the other end of the guide surface a downstream end for air flow along the guide surface and the guide surface is angled relative to the fan axis such that the other end of the guide surface is positioned at a front side of the direction of rotation of the blower fan. Air conditioning unit for a vehicle according to any one of Claims 6 until 11 wherein the air conditioner case has a downstream-side partition wall (126) provided between the first downstream-side ventilation path and the second downstream-side ventilation path to partition between the first downstream-side ventilation path and the second downstream-side ventilation path, and at least one of the plurality of downstream term guide members is connected to the downstream partition wall. Air conditioning unit for a vehicle according to any one of Claims 6 until 11 wherein the air conditioner case has a downstream-side partition wall (126) provided between the first downstream-side ventilation path and the second downstream-side ventilation path to partition between the first downstream-side ventilation path and the second downstream-side ventilation path, and the downstream-side partition wall has an end (126a). having one side in the axial direction, each of the plurality of downstream-side guide members has another end (28a) on the other side opposite to the one side in the axial direction, each of the plurality of downstream-side guide members on the one side in the downstream side partition wall is provided in the axial direction, and at least one of the other ends of the plurality of downstream-side guide members is aligned with the one end of the downstream-side partition wall in the axial direction.

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